Radio receiving apparatus



Sept. 3, 1935. M ALBEN 2,013,331

RADIo RECEIVING APPARATUS Original Fil`ed April 7, 1927 2 Sheets-Sheet 1.l l l v Zwar; andz/ozme conf/'05.

Ligi- Sept. 3, 1935 M. ALDEN 2,013,331

' RADIO RECEIVING APPARATUS oiginal Filed April 7, 1927 2 sheets-sheet 2A J E INVENTOR M/LT N N,

Patented Sept. 3, 1935 F F l @E RADIO RECEIVING APPARATUS Milton Alden,Brockton, Mass., assigner to Radio inventions, inc., New York, N. Y., acorporation of New York 1 Claim.

be moved independently of the other parts of the receiver in order thatthe program to be received may be controlled from a distance.

The receiver as a whole consists of the combination of an electricallydriven disc or turntable, a stylus-operated magnetic pick-up associatedtherewith, and an audio amplifier for use for the reproduction of bothrecords and broadcast signals, all arranged in one cabinet and aportable container carrying the tuning and control elements and theii`associated apparatus.

I thus produce a receiver in which many of the component parts are usedboth for radio reception and for record reproduction therebyconsiderably lowering the manufacturing cost, and due to the portablefeature of the tuning and control elements, the operation of the deviceas a radio receiver may be controlled from a. distance.

Referring to the drawings, Fig. l is a perspective View or oneembodiment of my invention, showing the radio control box removed fromthe cabinet.

Fig. 2 is a section and sid-e view of the apparatus with the control boxlocated in the cabinet.

Fig. 3 is a schematic Wiring diagram showing one of many possiblearrangements of the circuits.

'I'he cabinet El) may be of any suitable design and provided with anumber of chambers or compartments. One may preferably be furnished witha loud speaker having a grill or outlet l l at one side. An upperchamber has a hinged cover l2. The cabinet may also be provided with aninner shelf i3 having a recess or compartment lil adapted to hold theportable tuning or control box l5.

Upon a shelf il in a central compartment having a door i2 may be mountedan audio frequency amplifier i3.

A chamber may be provided in the bottom of the cabinet for the powersources for the vacuum tubes, such as the cathode heating battery i9 andthe anode supply batteries 2? and 2 l but it should be understood thatbattery eliminators, motor generators, or other means of power supplymay be employed.

The loud speaker movement 22 may be secured to the wall 23 of the recessor well Hi and its cone-like diaphragm 22' may be secured to or behindthe outer edge of the grill l I.

(Cl. Z50-20) The disc or turntable 24, is mounted in the centralcompartment upon the horizontal shaft 25 for supporting and driving therecord 28. An induction motor 26 receiving current from the housecurrent source 2l drives the disc 2li.

Depending from the carriage 3l is the stylusoperated magnetic pick-upLili.

The control box l5 is connected to the cabinet lil by a flexible cable56 which contains all necessary leads such as antenna, ground, batteryand detector out-put leads. Of course this cable may be wound on asuitable reel. This control box may contain a suitable radio frequencyamplifier 3G, and a detector 3i with their tuning and v01- urne controldevices which may be of any suitable type, I have shown a volume controlat ill, a detector rheostat at 48, a single tuning control, indicated ate9, such as the localized control disclosed in my co-pendingapplications #154,689, now Patent 1,871,293, or 163,196, now Patent1,832,175, and a plate battery 32.

A switch 5U having three positions is provided in a suitable place. Inone position all current is turned o. In the phonograph operatingposition of the switch shown in ull lines, the tubes Iof the audiofrequency amplifier are lighted, the

input to the audio frequency amplifier is connected to the phonographpickup and the alternating current house line 2l is connected suitablyto the disc driving motor 34.

In the radio operating position of the switch shown in dotted lines allthe tubes in the appa.- ratus are lit, the driving magnets 34 aredisconnected, and the' input of the audio frequency amplifier isconnected to the portable tuning unit.

The combination of the relatively stationary main cabinet and thecontrol portable unit makes it possible to store the heavy audio amplierapparatus and the main power source in any convenient or out-of-the-wayplace and mount the much lighter radio ampliiier and detector apparatusin a relatively small portable case.

It should be understood that I do not wish to limit myself to the specicembodiments of my invention, as shown and described, except insofar as Ido limit myself in the following claim.

I claim:

Radio receiving apparatus comprising a source of power, audio amplifyingmeans, a loud speaker and a separate control unit physically removedfrom all of the foregoing elements and connected thereto by flexibleconductors and comprising radio frequency amplifying means, detectormeans and all means necessary to effectively tune the receivingapparatus to various diifering frequencies, said flexible conductorsfurnishing to said separate control unit all electrical energy usedthereby.

MILTON ALDEN.

